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Lettere Potent Nm 81,746, dated Septenzber 1;, 1868.V

-IMPROYEMENT'IN' Doos-HOLDERS.

fitte ,rigihuie nient in in tigen ittenffrtent mitmitiug gift ai tin armi.

g To' WHOM ITIMAYCONCERN:

I Be it kfnowiitlzat I; GEORGE C. BUNSN, of. Belleville, the county of St. Clair, in 'the State of Illinois,

have invented a. new AutomatioHoor-Fastener; and I do hereby declare that the following is efulland exact i description thcreo'reierence being had` to the accompanying drawings, making part ol' this speoication, in

Figure is a plan viewmf the inside of the door-fastener. i

g Figaro II shows-the working of the spring in two-dii'erent directions, as applied in construction of Fig. I.

.My-invention is so contrived -that a bent lever, fastened on a. doorrand operating on the Hoor or in any other direction, irithoutrequiring o notoh, simply hy means of a permanent elastic pressure hearing on it,`overcomes,

' in the moving of the door, 'any unevonness of the floor or any other matter, without injuring the Hoor'- ortho lilre,e"ecting the moving of the door by means only of a greater pressure than the iraught of the air could produce. A g

I ei'ect this hy the foliol loyer in its two dierent positions. A. H represents the bent lever, hbeingthe'lower arm, and h the upper arm of said lever, with its centre o`r supporting-point at L.- The` pressure .of the springiI, acting either on the tooth h3 or i, mkes the lever either vself-actiiig, by pressing the arm k1, or sets it attest, by pressing the arm h2 in the opposite direction. Thejpressure i ofspring Ion teeth ha and h4 is e'ected'fbythe'mediating piece K turning hetween those teeth,'or direct. i The v leverbeing at rest,4 ighenever the piece K, by Ameans of spring I, is pressed against the tooth. h3, 'as in this posi-- tion,4it forms a double lever, by the ithrecconstruction points, ha, L, and h, of which ha is the point acted on, L is the axle,- and the endvof 7&1 is the p oin-t of' result; in this way the last point being moved reverse to the irst. y By pressingpiece K in the oppositedirection, b'y'means of spring I pressing against tooth the lever. will be self-:actingk as in this position a. simple lever is formed, by the three construction points h4, L, andlt, of

which h* is'the oint acted on, Iris thc-axle and the end of t is the oint ofresult; in Wek the rst and last p s p y points being moved' in the same direction. The-spring-dog or Ylivrer H has its supporting-point L on the case F.

The door-'fastener will be constructed of iron and vgatta percha, or othensuitable materials, aswell in 'the manner heretofore described, as in all other varieties which the principle of the invention allows, operating in the direction of the viioor, of the top orv sidesof the door, o r in any other direction, as it may be required hy the locality. 1 l 4 l Y l `Claim.- What I claim as my intention, and desire to secure by Letters Patent, isv The'combination and arrangementof the spring-dog or lever H with the case F,'for sperating as a door or window-holder, substantially as described.

" Y CH BUNSENJ Witnesses;

AUG. 'LMMERS, EUGENEA Srnncnnnsnc.'

ing arrangement, `the working of which is shown inV Fig. II, which shows the bentl i 

